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CVE-2026-10055

Quick assessment

Affected
Eclipse Foundation Eclipse Theia
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Eclipse theia是美国Eclipse基金会开源的一个可扩展的开发环境框架。 Eclipse Theia 1.26.0版本至1.73.0之前版本存在安全漏洞，该漏洞源于后台/services/request-service RPC在接受客户端URL时未进行验证或白名单检查，可能导致远程攻击者通过访问Theia服务连接发起服务端HTTP请求，暴露内部管理端点、云实例元数据服务等资源。

CVSS 8.5 · High EPSS 0.40% · P32

Affected Version Matrix 1

VendorProduct Version RangeStatus
Eclipse Foundation Eclipse Theia 1.26.0< 1.73.0 affected
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I. Basic Information for CVE-2026-10055

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In Eclipse Theia since version 1.26.0, the backend /services/request-service RPC accepts an attacker-controlled URL from any client connected to the standard /services messaging endpoint, performs the HTTP request server-side, and returns the full response body to the caller. Because the destination URL is neither validated nor allowlisted, a remote attacker with access to the Theia service connection can issue server-side HTTP requests to localhost or other backend-reachable hosts and read their responses, exposing internal administrative endpoints, cloud instance metadata services, and other resources that are intentionally outside the browser network boundary. The vulnerability affects deployments where the Theia service connection is reachable by untrusted users (for example, multi-tenant or publicly-reachable Theia deployments).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Eclipse Theia 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Eclipse theia是美国Eclipse基金会开源的一个可扩展的开发环境框架。 Eclipse Theia 1.26.0版本至1.73.0之前版本存在安全漏洞，该漏洞源于后台/services/request-service RPC在接受客户端URL时未进行验证或白名单检查，可能导致远程攻击者通过访问Theia服务连接发起服务端HTTP请求，暴露内部管理端点、云实例元数据服务等资源。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Eclipse Foundation Eclipse Theia 1.26.0 ~ 1.73.0 -

II. Public POCs for CVE-2026-10055

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 9022 chars
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III. Intelligence Information for CVE-2026-10055

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Vendor Advisories for CVE-2026-10055 (2)

IV. Related Vulnerabilities

Same product: Eclipse Theia
Same vendor: Eclipse Foundation
Same weakness: CWE-918

V. Comments for CVE-2026-10055

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